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Thread: Pentair Whisper Flo Pump Leaking & Hot

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    Pentair Whisper Flo Pump Leaking & Hot

    I have a 1.5HP Pentair Whisper Flo 2 speed pump (WFDS-6 product # 011522) that seems to be leaking under the unit. On high speed water level in the filter basket is good, but once it's on low speed the water lever decreases. Water level in the filter tank drops as well whenever it runs on low speed.

    Went out this morning after the pump had been on for about 5 hours & there was only an inch or two water in the bottom of the basket, filter tank was empty & no water was being pumped whatsoever. shut off pump immediately. Ran it again this afternoon on high & low for 10 minutes. Though it seemed be moving water adequately, the pump was extremely hot to the touch. The pump is about 4 years old at this point.

    Not sure what to do next. My pool equipment expertise is minimal, but i'm handy enough if i had an idea of what needs to be fixed.

    Thanks for the help.
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Mod Squad zea3's Avatar
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Can you post any pictures of the pump and filter showing the leak?

    Please edit your signature to include information about the pool such as pool type (above ground or in ground), surface (vinyl, plaster, or fiberglass), size in gallons, pump brand and horsepower, filter type (sand, DE, or cartridge), filter brand and size, and any water features, cleaning systems, and if there is a spa (attached or detached).
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Here's a pic of the equipment.
    [attachment=0:3m1z94zf]IMG_0151_L.jpg[/attachment:3m1z94zf]
    the leak is coming from the pump closest to the filter. Immediately after running, water can be heard moving through the pump- some of which is leaking out.
    Attached Images Attached Images
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Re: Pentair Whisper Flo Pump Leaking & Hot

    did some more digging today. took pump assembly apart & replaced the "O" ring (called gasket in schematic). no help- leak still present.
    [attachment=1:1zv6rx0v]Screen Shot 2013-08-07 at 6.03.42 PM.png[/attachment:1zv6rx0v]

    leak seems to be coming from the bottom of the unit where the seal plate connects to the pump. all water drains out as soon as the pump is turned off. Do i need to replace another seal inside the unit?
    [attachment=0:1zv6rx0v]Screen Shot 2013-08-07 at 6.17.43 PM.png[/attachment:1zv6rx0v]
    Attached Images Attached Images
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Mod Squad jblizzle's Avatar
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    That is likely the ceramic shaft seal that is leaking. It is in the picture but not labeled.

    The heat could be developing due to the bearings getting wet and messed up after the leak started.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Quote Originally Posted by jblizzle
    That is likely the ceramic shaft seal that is leaking. It is in the picture but not labeled.

    The heat could be developing due to the bearings getting wet and messed up after the leak started.
    Any idea how difficult/expensive the ceramic shaft seal is to replace? rubber gasket was a snap- this seems a bit more involved according to Pentair's manual.
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Mod Squad jblizzle's Avatar
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    There are things called go-kits that include all the seals. I think the shaft seal alone is less than $15.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Quote Originally Posted by jblizzle
    There are things called go-kits that include all the seals. I think the shaft seal alone is less than $15.
    ok- so i don't need a new seal plate, just new gaskets?
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Mod Squad jblizzle's Avatar
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    The shaft seal is ceramic. I am not sure what you mean by gaskets
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Quote Originally Posted by jblizzle
    The shaft seal is ceramic. I am not sure what you mean by gaskets
    sorry- i'm a noob. i was referring to the seals. thanks for the help- i'll get the new seals tomorrow and see if that helps
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Quote Originally Posted by acrossawire
    Quote Originally Posted by jblizzle
    Any idea how difficult/expensive the ceramic shaft seal is to replace? rubber gasket was a snap- this seems a bit more involved according to Pentair's manual.
    Easy, I did it!

    Go kits here: https://www.google.com/search?q=whis...&ved=0CLkBELMY
    Just make sure you get the right kit for your model.

    Lots of How to video's on YouTube. Here's one:
    http://www.youtube.com/watch?v=CuLtT_fe8B8
    30,000 gal, 20 x 40 ft vinyl, IG, installed 2006
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    Success!!

    thanks for all the assistance- replaced the shaft seal & now it's leak free. video was super helpful
    15'x30' 18k gallon pebble sheen pool, 1.5HP Pentair WhisperFlo 2 speed pump, 420 sq-ft Cartridge Filter, Hayward Navigator, Gulf Stream HE125-T-A Heat Pump, (2) 3' waterfalls run by 1.5HP Pentair WhisperFlo 1 speed pump

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    bhenderson0413's Avatar
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    Re: Pentair Whisper Flo Pump Leaking & Hot

    I had the same exact issue with a leak in the same location, replaced everything but the impeller and the seal plate. I don't think the impeller would contribute to the leak in that location. Has anyone had to replace a seal plate to eliminate a leak or would this be a waste of money? The leak is super slow, but it is leaking nonetheless, which drives this AAA personality crazy. Thanks in advance.

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